JP2000217218A - Subaqueous cable laying platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate mounting and dismounting of a capstan-type braking device to and from a ship, and reduce cost and time required for retrofitting and restoring a cargo ship or the like. SOLUTION: A ship body 11 floating on the water is equipped with a braking device, comprising a cable housing device consisting of a turntable 13 and a capstan 17 around which a cable C is wound into a loop shape. The capstan 17 is so arranged that the capstan is rotatable horizontally on a vertical rotary shaft and is installed on the deck of the ship body 11. As a result, installation and removal of the capstan 17 on and from the ship 11 is facilitated, and the state of the cable C wound on the capstan 17 can be losily checked visually. The wire-winding portion of the capstan 17 is tapered so that the diameter of the lower periphery where the C cable is reeled in is larger and the diameter of the upper periphery where the cable C is reeled out is smaller. Thus, the cable C wound on the capstan 17 is readily released from the capstan 17, and the cable C is wound off of the capstan 17 smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater cable laying barge for laying cables such as power cables on the water bottom.

[0002]

2. Description of the Related Art A submarine cable laying barge that lays a cable such as an electric power cable on the water bottom is rarely built as a dedicated ship. Is temporarily installed on the hull, and after the cable laying work is completed, the outfitting used for the cable laying work is removed from the hull and restored to its original form as a cargo ship.

[0003] The submarine cable laying barge is equipped with a cable accommodating device for accommodating the cable and a brake device for adjusting the speed at which the cable is drawn out into the water. As shown in FIG. 3, the cable housing device is provided with a turntable 113 rotatably housing the cable C in a coil shape, and the brake device is provided with a cylindrical capstan 117 around which the cable C is wound in a loop shape. Is rotatably provided. The cable C is sent out from the turntable 113 to the rear, and the feed speed of the cable C is adjusted by the capstan 117.
The cable C is fed out into the water via the cable 9 and laid on the bottom of the water.

[0004]

In the conventional submarine cable laying barge, the capstan 117 is configured to rotate vertically about a horizontal rotation axis, and such a vertical capstan 117 is used. In order to install the brake device having the hull 111 on the hull 111, it is necessary to significantly remodel the cargo ship and the like. There was a problem. Further, in the vertical capstan 117, only the winding and unwinding points of the cable C are the hull 1
11 is exposed on the deck, and most of the capstan 117 is hidden.
There was a problem that the winding state of the could not be visually confirmed.

In view of the above problems, the present invention makes it possible to easily install and remove a brake device having a capstan on a hull, and to reduce the cost and time required for remodeling a cargo ship and restoring a prototype. An object of the present invention is to provide a submarine cable laying barge that can reduce the number of cables and can easily confirm the winding state of the cable around the capstan by visual observation.

[0006]

According to the first aspect of the present invention, a hull floating on water is provided, and the hull adjusts a cable accommodating device for accommodating a cable and a feeding speed of the cable into the water. In a submarine cable laying barge equipped with a brake device, the brake device is provided with a cylindrical capstan around which the cable is wound in a loop, and lays the cable on the water bottom while moving the hull forward.
The capstan is installed on the deck of the hull and rotates horizontally around a vertical axis of rotation.

According to the first aspect of the present invention, the capstan can be installed on the deck of the hull by rotating the capstan horizontally about a vertical rotation axis, and thus has a capstan. The brake device can be easily installed on and removed from the hull, and the cost and time required for modifying a cargo ship and restoring a prototype can be reduced.
In addition, by installing the capstan on the deck of the hull, the winding state of the cable around the capstan can be easily checked visually.

Further, in the invention according to claim 2,
The winding part around which the capstan cable is wound,
The outer peripheral diameter on the lower side where the cable is wound is large, and the outer peripheral diameter on the upper side where the cable is unwound is formed in a tapered shape. According to the second aspect of the present invention, the cable wrapped around the capstan can be easily separated from the capstan, and the cable can be smoothly unwound from the capstan.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view schematically showing a submarine cable laying barge according to an embodiment of the present invention, and FIG. 2 is an elevation view schematically showing a capstan in FIG.

As shown in FIG. 1, a submarine cable-laying barge 10 according to an embodiment of the present invention includes a hull 11 that floats on water, and is configured to be able to sail on water.
A cable housing device including a turntable 13 and the like is provided on the deck at the front of the hull 11, and the turntable 13 accommodates a cable C such as an electric power cable in a coil shape and sends it out rearward. , And is supported so as to be rotatable horizontally about a vertical rotation axis.

On the deck in the middle part of the hull 11, a cable C sending side (right side) behind the turntable 13 is provided.
, Caterpillar type (endless track type) brake device 15
Are provided so as to clamp the cable C from both left and right sides. Further, on the deck at the rear of the hull 11, a capstan type brake device including a capstan 17 and the like is provided behind the caterpillar type brake device 15, and the cable C is looped on the capstan 17 in a loop shape. It can be wound around. A sheave 19 is provided at the rear end (stern) of the hull 11 so that the cable C can be put into the water without forcibly bending the cable C.

The underwater cable-laying barge 10 advances the hull 11 at a predetermined speed above the water, and the turntable 1
The cable C is sent backward from the hull 3 and the feed speed of the cable C is adjusted by the caterpillar type brake device 15 and the capstan type brake device (capstan 17).
The cable C is put into the water from the rear end of the hull 11 through the sheave 19 while being adjusted so as to correspond to the forward speed of the vehicle, and the cable C is laid on the bottom of the water.

The capstan 17 of the capstan type brake device is installed on the deck of the hull 11 and is configured to rotate horizontally about a vertical rotation axis. That is, the capstan 17 can be installed on the deck of the hull 11 by being horizontally rotatable about a vertical rotation axis. By installing the capstan 17 on the deck of the hull 11 in this manner, the capstan 17 can be easily installed on and removed from the hull 11, and the cost required for remodeling and restoring the prototype of a cargo ship, The time can be reduced, and the winding state of the cable C around the capstan 17 can be easily confirmed visually.

Further, as shown in FIG.
7 is provided with a parallel cylindrical portion 17a having a constant outer diameter, and a lower portion of the capstan 17 is provided with a tapered cylindrical portion 17b having a smaller upper outer diameter and a larger lower outer diameter. . And the cable C is the tapered cylindrical portion 1
The cable C is wound in a loop around the outer circumference of the cable 7b, so that the cable C winding side is down and the cable C unwinding side is up. Therefore, since the cable C is unwound from a portion having a small outer diameter of the tapered cylindrical portion 17b, the cable C is easily separated from the capstan 17,
The unwinding of the cable C from the capstan 17 can be performed smoothly.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments. For example, in the above-described embodiment, the case where the portion of the capstan around which the cable is wound is formed in a tapered shape, but the portion of the capstan where the cable is wound need not necessarily be tapered.

[0016]

According to the first aspect of the present invention, the capstan can be installed on the deck of the hull by rotating the capstan horizontally about a vertical axis of rotation. It is possible to easily install and remove the brake device having the above on the hull, and reduce the cost and time required for remodeling and restoring the prototype of a cargo ship.
In addition, by installing the capstan on the deck of the hull, the winding state of the cable around the capstan can be easily checked visually.

According to the second aspect of the present invention, the cable wrapped around the capstan can be easily separated from the capstan, and the cable can be smoothly unwound from the capstan.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a submarine cable laying barge according to an embodiment of the present invention.

FIG. 2 is an elevational view schematically showing a capstan in FIG. 1;

FIG. 3 is an elevational view schematically showing a conventional submarine cable laying barge.

[Explanation of symbols]

 C cable 10 laying barge 11 hull 13 turntable (cable receiving device) 15 caterpillar type brake device 17 capstan (capstan type brake device) 17a parallel cylindrical portion 17b tapered cylindrical portion (wrapped portion) 19 sheave

Claims (2)

[Claims] A hull floating on water is provided, and the hull is equipped with a cable accommodation device for accommodating a cable, and a brake device for adjusting a feeding speed of the cable into water. Is provided with a cylindrical capstan around which the cable is wound in a loop, and in a submarine cable laying boat for laying the cable on the water bottom while advancing the hull, the capstan is mounted on a deck of the hull. A submarine cable laying barge that is installed and rotates horizontally about a vertical rotation axis. 2. A portion of the capstan around which the cable is wound is formed in a tapered shape in which a lower outer diameter in which the cable is wound is large and an upper outer diameter in which the cable is unwound is small. The undersea cable laying barge according to claim 1, wherein: